Wood rim for cycles



(No Model.) 1 Y W.. H. HERHOLD.

WOOD RIM FOR CYCLES.

No. 561,166. Patented June 2, 1896.

@yl ,EHIIHIH f al i l UNITED STTES PATENT OFFICE.

VILLIAM II. HERIIOLD, OF CHICAGO, ILLINOIS.

woon RIM FoR CYCLES.

SPECIFICATION forming part of Letters Patent No. 561,166, dated J une 2,1896.

Application filed August 6, 1895. Serial No. 558,367. (No model.)

To all whom. it may concern.:

Be it known that I, WILLIAM H. HEEHOLD,

a Citizen of the United States, residing at Chicago, in the County ofCook and State of Illinois, have invented certain new and usefulImprovements in Wood Rims for Cycles; and

form of joint is'avoided.

I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable'others skilled in theart to which it appertains to make and use the same, reference beingmade to the accompanying drawings, and to the letters of referencemarked'thereon, which form a part of this specification.

The object of the invention is to so join the meeting ends of thecontinuous piece of which the rim is formed that the cement is relievedof any sliding strain, while a complicated My improved joint is a simplesplice or scarf with the meeting faces grooved transversely andlongitudinally.

In the drawings I show in Figure l a plan view of the strip of which therim is formed, the ends being prepared for joining. Fig. 2 is an edgeview of the same. Fig. 3 is an edge View of the rim after the joint ismade. Fig. 4 is a cross-section in the line 4c 4; of Fig. 3. Fig. 5isthe same view, the rim having been completed. Figs. 6 to IO showvarious modications in the form of the joint, Fig. 7 being on the line 77 of Fig. 6.

The strain upon a cycle-rim of modern form, the spokes being of wire andconsequently under great tension, is central, tending to contract therim. A simple form of scarfed joint in which reliance is placed solelyupon the cement to prevent the contact-faces sliding the one upon theother is difficult to maintain, the parts having a tendency to creep.Such a joint is, however, much simpler of construction than a mortisedjoint, andl in that it is less liable to start a fracture of the ma-Yterial is the best form but for the objection mentioned.

I prepare the strip A of which the rim is formed by obliquely scarng itsends 'upon opposite sides, as plainly shown in Fig. 2, and thenchanneling or corrugating the scarfed surface with numerous grooves,both transverse and longitudinal, as indicated at CBD. These grooves,whether transverse or longitudinal, may be V-shaped in cross-section, asshown in Fig. 4, or regularly curved, as shown in Figs. 6 and '7, orthey may be square in cross-section, as shown in Fig. 10. The strip Abein g bent to a circle the transverse grooves C C come into cooperationand the sections B of the longitudinal groovin g coperate with thesections D.

The tendencyof the rim to contract in diameter by reason of the greatstrain of the spokes is resisted by the central section of transversegrooves, While the longitudinal grooves at the extreme end of the pieceof which the rim is formed prevent the joint from breaking laterally bysecurely holding the parts Where they must first separate in the eventof such fracture.

I am aware that rims have been made with a scarfed joint and also thatsuch a joint has been longitudinally grooved to prevent lateraldisplacement, and I do not broadly claim such forms.

What I claim as my invention, and desire protection in, is-

A wood cycle-rim formed of a continuous piece bent to a circle andhaving its ends united by an oblique scarfed joint, a portion of each ofthe scarfed surfaces having a series of corresponding transverse groovesand a portion thereof having a series of corresponding longitudinalgrooves, substantially as described and for the purpose stated.

In testimony whereof I have aiiiXed my signature in the presence of twowitnesses.

WILLIAM II. HERHOLD.

Witnesses:

LoUIs K. GILLsoN,' W. C. CoELIEs.

